The US Dollar (USD) amount is calculated based on the current value of the cryptocurrency in your wallet. Thus, it is normal for the USD amount of your Total Balance to change from time to time, since the Dollar equivalent changes whenever the price of cryptocurrencies change.
What does remain constant is the cryptocurrency amount in your wallet. You may check this and other cryptocurrency balances on the Portfolio tab of your account.
If you notice any unexpected changes in the amount of BTC or other cryptocurrency, please go to your Transaction History to review the incoming and outgoing transfers initiated from your wallet.
Leave us a message through our Chatbot widget, Coins Support Form, or email us at [email protected] if you need any help with identifying transfers.